Make livemark articles self-contained?

[roll]

Overview

It will allow us to go forward with #227

Implementation

There are only a few plugins that depend on external local files so we just need to include data of image/chart/table etc to the page.

The search index might be an exception of a shared file but only shared if there are pages. If the search index is not available the page should hide the search probably (or create index on the flight)